Abstract
Three protocols of blood transfusion were evaluated in a canine model for (1) the strength and breadth of leukocytotoxin induction, (2) the induction of cell-mediated immunity against the blood donors, (3) haemagglutinin production, and (4) any effect on kidney graft survival. At the end of the transfusion schedule, each dog received a kindey graft and was given azathioprine and prednisolone postoperatively. All dogs were unrelated and blood donors were not used as kidney donors. All three transfusion protocols, comprising i.v. injections of blood twice weekly or every 2 weeks from one or three donors, induced unacceptably strong and broad leukocytotoxins. All transplants performed across a positive crossmatch failed to function. However, where a negative crossmatch was available, the trend of results was that the transfused dogs had better graft survival than nontransfused animals similarly treated with azathioprine and prednisolone. Only one dog produced haemagglutinins. Several animals had positive cell-mediated immunity against the blood donors, but the response was not strong and was frequently not sustained.
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